etcd_worker: batch etcd patch (#3277)

cdc/capture/capture.go

@@ -270,7 +270,8 @@ func (c *Capture) runEtcdWorker(ctx cdcContext.Context, reactor orchestrator.Rea
 	if err != nil {
 		return errors.Trace(err)
 	}
-	if err := etcdWorker.Run(ctx, c.session, timerInterval); err != nil {
+	captureAddr := c.info.AdvertiseAddr
+	if err := etcdWorker.Run(ctx, c.session, timerInterval, captureAddr); err != nil {
 		// We check ttl of lease instead of check `session.Done`, because
 		// `session.Done` is only notified when etcd client establish a
 		// new keepalive request, there could be a time window as long as

cdc/metrics.go

@@ -25,6 +25,7 @@ import (
 	"github.com/pingcap/ticdc/cdc/sorter/unified"
 	"github.com/pingcap/ticdc/pkg/actor"
 	"github.com/pingcap/ticdc/pkg/etcd"
+	"github.com/pingcap/ticdc/pkg/orchestrator"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -44,6 +45,7 @@ func init() {
 	etcd.InitMetrics(registry)
 	initServerMetrics(registry)
 	actor.InitMetrics(registry)
+	orchestrator.InitMetrics(registry)
 	// Sorter metrics
 	memory.InitMetrics(registry)
 	unified.InitMetrics(registry)

errors.toml

@@ -241,6 +241,11 @@ error = '''
 the etcd txn should be aborted and retried immediately
 '''
 
+["CDC:ErrEtcdTxnSizeExceed"]
+error = '''
+patch size of a single changefeed exceed etcd txn max size
+'''
+
 ["CDC:ErrEventFeedAborted"]
 error = '''
 single event feed aborted